I have an early 2008 iMAC. I checked the disk utility earlier today and my S.M.A.R.T is failing. The computer has been a little sluggish and I should have known since I still have a lot of space left on the comp. My question is if I should get a regular hard drive replacement (1TB) or if I should get the 2TB. The reason why I am questioning this is because I am a film student and I run many programs on my computer from Final Cut Pro to Pro Tools to Adobe. Which would be better?